Siproxd error

Just installed the siproxd package on mij pfsense release 1.2.3 box but when I opened the interface en choose the tab 'Registered Phones' I get the following error:
"Fatal error: Call to undefined function: gettext() in /usr/local/www/siproxd_registered_phones.php on line 39"

Should I bother configuring siproxd any further or do I have to fix this error first, if so how?

That isn't related to the original problem on this thread, if you start a new thread with more information someone may be able to help. Search the forum before you do, I just answered that same question for someone in the last week.